If you look at the Wikipedia article cited for Heydrich, Reinhard, 1904-1942, and go to the section headed "external links", subsection "authority control", you will see links to the LCNAF and the VIAF, among others.
Why are we replicating information from various sources, rather than linking to them? Or maybe linking isn't even necessary, because people who want to read summaries of Heydrich's life can search Wikipedia (or Google). If they want a book about him, they can search a library catalog, with the aid of an authority record that identifies him and distinguishes him from others.
I am feeling more and more out of step with the direction that NACO is taking (in fits and starts, and with much discussion).
But I'm retiring at the end of April.